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Re: [Qemu-devel] [PATCH 5/5] drive_open: Add invalidate option for block
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From: |
Christoph Hellwig |
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Subject: |
Re: [Qemu-devel] [PATCH 5/5] drive_open: Add invalidate option for block devices |
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Date: |
Fri, 7 Jan 2011 09:38:55 +0100 |
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User-agent: |
Mutt/1.3.28i |
On Tue, Jan 04, 2011 at 03:33:30PM +0100, Juan Quintela wrote:
> Linux allows to invalidate block devices. This is needed for the incoming
> migration part.
It's not. The only thing that makes migration on block devices safe is
using O_DIRECT, aka cache=none.
- [Qemu-devel] [PATCH 0/5] Fix migration with NFS & iscsi/Fiber channel, Juan Quintela, 2011/01/04
- [Qemu-devel] [PATCH 2/5] blockdev: don't leak id on removal, Juan Quintela, 2011/01/04
- [Qemu-devel] [PATCH 3/5] blockdev: release resources in the error case, Juan Quintela, 2011/01/04
- [Qemu-devel] [PATCH 4/5] Reopen files after migration, Juan Quintela, 2011/01/04
- [Qemu-devel] [PATCH 5/5] drive_open: Add invalidate option for block devices, Juan Quintela, 2011/01/04
- [Qemu-devel] [PATCH 1/5] migration: exit with error code, Juan Quintela, 2011/01/04
- [Qemu-devel] Re: [PATCH 0/5] Fix migration with NFS & iscsi/Fiber channel, Juan Quintela, 2011/01/10